Enhanced PEC performance of hematite photoanode coupled with bimetallic oxyhydroxide NiFeOOH through a simple electroless method

摘要： The oxygen evolution reaction (OER) is one important bottleneck in the development of economical photoelectrodes. Herein, we firstly prepared bimetallic oxyhydroxide NiFeOOH layer on Fe2O3 photoanode through a simple electroless ligand-regulated oxidation method in order to build highly-matched semiconductor/cocatalyst interface. Benefited from the accelerated OER kinetics and low overpotential of bimetallic oxyhydroxide NiFeOOH, the resultant Fe2O3/NiFeOOH core-shell with strongly-bound heterojunction interface possesses better visible light absorption, enhanced photocurrent density (1.83 mA/cm2 at 1.23 VRHE) and good stability than bare Fe2O3 and semi-FeOOH and NiOOH decorated Fe2O3 photoanodes. We believe this work provides a new pathway for designing high-quality contact interface of various photoelectrode/catalyst.